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Related Experiment Videos

[Some aspects of virulence].

M L Joly-Guillou1

  • 1Service de Microbiologie, Hôpital Louis Mourier, Colombes.

Presse Medicale (Paris, France : 1983)
|December 22, 1999
PubMed
Summary

Glycopeptides alter staphylococci cell walls, potentially impacting material adherence in VISA strains. Quorum sensing significantly influences Gram-negative bacterial virulence, with deficient strains aiding in understanding disease effects.

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Area of Science:

  • Microbiology
  • Bacterial Pathogenesis
  • Molecular Biology

Context:

  • Glycopeptide antibiotics interact with bacterial cell walls, particularly in Staphylococcus strains.
  • Vancomycin-intermediate Staphylococcus aureus (VISA) strains exhibit cell wall modifications.
  • Quorum sensing is a critical regulatory system for bacterial virulence in Gram-negative pathogens.

Purpose:

  • To investigate glycopeptide-induced modifications in staphylococci cell walls.
  • To explore the role of quorum sensing in Gram-negative bacterial virulence and pathophysiology.

Summary:

  • Glycopeptides induce changes in the staphylococci cell wall, a phenomenon observed in VISA strains that may relate to bacterial adherence to surfaces.
  • Quorum sensing, a system regulated by bacterial population density, is integral to Gram-negative bacterial virulence.
  • Utilizing quorum sensing-deficient strains in a rat model elucidated pathophysiological effects associated with this virulence system.

Impact:

  • Findings contribute to understanding antibiotic resistance mechanisms and bacterial adhesion.
  • Insights into quorum sensing provide potential targets for novel anti-virulence strategies against Gram-negative infections.

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